Daylighting device

Abstract

A daylighting device of the present invention includes: a daylighting member including: a first light-transmitting base member; and a plurality of protruding, light-transmitting daylighting sections provided on a first face or a second face of the first light-transmitting base member; and a ventilation hole configured to enable a space on the first face to communicate with a space on the second face opposite from the first face.

What is claimed is: 
     
       1. A daylighting device, comprising:
 a daylighting member comprising: 
 a first base member having light-transmitting properties; and 
 a plurality of protruding daylighting sections having light-transmitting properties and provided on a first face of the first base member; and 
 at least one ventilation hole configured to enable a first space to communicate with a second space on a second face opposite from the first face, the at least one ventilation hole being provided at the first base member and the plurality of protruding daylighting sections, 
 wherein the at least one ventilation hole is only formed in an upper portion of the daylighting device. 
 
     
     
       2. The daylighting device according to  claim 1 , wherein the ventilation hole is provided in a region where the daylighting member makes no contribution to daylighting. 
     
     
       3. The daylighting device according to  claim 1 , wherein:
 the daylighting member has a first through hole extending through a thickness direction of the daylighting member; and 
 the ventilation hole comprises the first through hole. 
 
     
     
       4. The daylighting device according to  claim 3 , further comprising a light-diffusion member provided on either a light-entering side or a light-exiting side of the daylighting member, wherein:
 the ventilation hole comprises the first through hole and a second through hole extending through a thickness direction of the light-diffusion member; and 
 the second through hole at least partially overlaps the first through hole when viewed normal to the daylighting member. 
 
     
     
       5. The daylighting device according to  claim 4 , wherein:
 the light-diffusion member is provided on the light-exiting side of the daylighting member; and 
 the second through hole is smaller in size than the first through hole. 
 
     
     
       6. The daylighting device according to  claim 4 , wherein:
 the second through hole has such a shape that has a lengthwise direction; and 
 the second through hole resides so that the lengthwise direction thereof is parallel to an extension direction of the daylighting sections. 
 
     
     
       7. The daylighting device according to  claim 4 , wherein:
 the light-diffusion member comprises an adhesive layer having such anisotropy in light-diffusion properties as to diffuse more light in a direction that intersects the two disposition directions than in the two disposition directions; and 
 the daylighting member is provided on a transparent base member with the light-diffusion member interposed therebetween. 
 
     
     
       8. The daylighting device according to  claim 4 , wherein the ventilation hole forms a single communication hole by comprising the daylighting member, the light-diffusion member, and an affixing member provided between the daylighting member and the light-diffusion member disposed at a distance from each other. 
     
     
       9. The daylighting device according to  claim 1 , wherein the ventilation hole is provided in a region through which not much sunlight enters the daylighting member. 
     
     
       10. The daylighting device according to  claim 1 , wherein the ventilation hole has an inner face on which there is provided a material having light-blocking properties. 
     
     
       11. The daylighting device according to  claim 1 , further comprising a frame containing at least the daylighting member, wherein the ventilation hole is provided between the daylighting member and the frame. 
     
     
       12. The daylighting device according to  claim 1 , further comprising a frame containing at least the daylighting member, wherein the frame has at least two openings, one containing the daylighting member and the other serving as the ventilation hole. 
     
     
       13. The daylighting device according to  claim 1 , further comprising an exhaust fan in the ventilation hole, the exhaust fan being configured to vent air via the ventilation hole from a light-entering side to a light-exiting side. 
     
     
       14. The daylighting device according to  claim 1 ,
 wherein the at least one ventilation hole is a plurality of ventilation holes provided along an extension direction of the plurality of protruding daylighting sections. 
 
     
     
       15. The daylighting device according to  claim 14 ,
 wherein each of the plurality of ventilation holes has a cornerless planar shape. 
 
     
     
       16. The daylighting device according to  claim 14 ,
 wherein the at least one ventilation hole comprises at least three ventilation holes, and 
 the at least three ventilation holes are provided along the extension direction of the plurality of protruding daylighting sections. 
 
     
     
       17. The daylighting device according to  claim 1 , further comprising:
 a caulking material provided at a peripheral portion of the first base member.